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"An upper approximation to the BIBD (15, 21, 7, 5, 2)."
R. G. Stanton, R. W. Buskens (1990)
- R. G. Stanton, R. W. Buskens:
An upper approximation to the BIBD (15, 21, 7, 5, 2). Australas. J Comb. 2: 181-190 (1990)
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